Hi Ian,
Please allow me to clarify that my "highly recommended" is based on results achieved. Yes, the video "tutorial" is a bit frustrating because he doesn't really explain things well (IMO) and he seems to have a lot of hardware problems. I will warn you ahead of time that it does require some concerted effort to begin using this tool. It seems to me that much confusion surrounds what hardware is used to measure the targets. If using an I1, for example, which I think is what he uses it's all more straight forward because you can simply follow along with what he does. If using a ColorMunki like I was, it took many e-mails exchanged and some additional documentation from him for me to understand how to use this device to create the curves. Additionally, on the Windows side there was no tool available to help smooth out the curves, if needed. The latest version (v3) now has curve smoothing built in which helps a lot.
Perhaps another comment I might offer for your consideration is that he doesn't seem to keep his buyers up-to-date when new versions are available. Personally, I don't appreciate that! For example, my frustration level finally got to the point that I wrote an e-mail explaining the difficulties I was having and that, without some ability to smooth the curves, that his product was basically useless to me; I asked if a refund was available. That same day, I received a reply with the new v3 attached which included the built in curve smoothing. Since I bought v1, I was left wondering why I hadn't heard about v2 and v3! Anyway, I'm nitpicking a bit...
Btw, if your on a Mac there is a tool for curve smoothing already available via the QTR website.
If you do decide to buy and you need help, I'll do what I can to help out.